Cotton-gin.



S. D. MURRAY.

COTTON GIN.

APPLICATION FILED SEPT. 13, 1907.

1,089,255, Patented Mar. 3, 1914.

3 SHEETS-SHEET 1.

71 2 zawas: Invmlvr 4m $50703.

APPLIOATION FILED SEPT. 13, 1907.

S. D. MURRAY.

COTTON GIN.

Patented Mar. 3, 1914.

3 SHEETS-SHEET 2.

COLUMBIA PLANOURAPH co.,wA ;.s-.--Ton, u. c.

S. D. MURRAY.

COTTON GIN.

APPLIOATION FILED SEPT. 13, 1907.

1,089,255, Patented Mar. 3, 1914.

s SHEETS-SHEET s.

STEPHEN D. MURRAY, OF DALLAS, TEXAS.

COTTON-GIN.

lessees.

Specification of Letters Patent.

Patented Mar. 3,1914.

Application filed September 13, 1907. Serial No. 392,652.

To all whom it may concern Be it known that I, STEPHEN D. MUR- any, acitizen of the United States, residing at Dallas, in the county ofDallas and State of Texas, have invented new and useful Improvements inCotton-Grins, of which the following is a specification.

This invention relates to cotton gins embodying a brush cylinder, andthe objects of the same are to provide a strong and durable cot-ton ginframe comprising a simple organization wherein the numb-er of parts isreduced to a minimum, and a gin with a longitudinal tubular memberhaving a brush cylinder cooperating therewith and which serves as aconduit for the passage of the lint cotton from the gin and also as aconnecting means for the legs of the gin frame and as an end outlet forthe gin, and leaving the rear of the latter unobstructed and freelyaccessible.

The improved construction of gin frame including the longitudinaltubular member may be embodied in a single gin organization, andconsisting of three members, two end or leg members and a singlelongitudinal member or tube, or a double gin frame may be made of onlyfour members, three leg members and one longitudinal member.

T he number of gins included in a battery of gins, and involving theimproved frame structure may be modified at will, and the intermediateleg members are varied in their construction with respect to the end legmembers, as will be more fully hereinafter specified. lhe salientfeature of the present invention is, however, a tubular memberlongitudinally disposed in the body of the gin and lying along theginning mechanism,

and particularly in combination with a brush cylinder incontradistinction to a gin structure, wherein a brush cylinder is notused. Aside from the function of the tubular member as a lint flue orconduit and in dependently of said function, the tubular member greatlyincreases the rigidity and stiffness of the gin frame, the tubularmember or tube preferably forming a part of the gin, frame structure,for rigidly securing the legs in their relative positions to each other,and aside from this important function, the tubular member or tubepassing through the gin or gins and through the legs thereof has manyadvantages in structural condensation, requiring very much less room andforming a more direct passage for the lint from the gin brushes, withless superficial area in the lint flue, dispensing with the short lintflue connections, and various angles and turns found in present gin flueconstructions, and wh1ch cause frictional resistance to the aircurrents. Frictional resistance to the air currents is greatly lessenedby placing the tubular member or lint flue within the gin or gins andadjacent to the brushes, and consequently the efficiency of cotton ginstructures is thus also materially increased. The mostessential featureof the invention, therefore, is the tubular member within the body ofthe gin in contradistinction to the tubular flues disposed at the backportions of gins and usually having communicating fiues extendingthrough the rear of the gin structures at an angle to the ginningmecl'ianism. The tubular member of the present invention is of uniformdiameter throughout its length and in this respect essentially difiersfrom lint fines or tubular devices which gradually increase in diameterfrom a minimum to a maximum diameter to avoid deposits or clogging ofthe lint cotton in the flue in accordance with the gin organizations asheretofore constructed. The gradual or constantly increasing dimensionsof the lint fines as heretofore constructed toward the delivery oroutlet ends was necessary to reduce the resistance or to maintain thelatter as small as possible. In gins embodying brushes and having lintflues as heretofore constructed, the revolution of the brushes effectedan indrawing of a volume of air and an expulsion of the air rearwardlyinto the flue in such manner that the velocity was comparatively low andthe volume of the air very large, and for this reason the lint fine wasrequired to be large toward the outlet end or gradually increasing fromthe initial end thereof in connection with the first gin toward theoutlet extremity thereof beyond the last gin. By the use of the tubularmember the cost of production of sins is lessened, and also the cost ofthe building in which such gins are installed.

The use of the tubular member with a brush cylinder is not confined toany particular type of gin, and may be introduced and perform its desred functions in any gin having a brush cylinder.

In the drawings: Figure l is a front elevation of a battery of ginsshowing the improved structure applied thereto. Fig. 2 is a transversevertical section on the line 2-2, Fig. 1. Figs. 3, a and 5 are detailviews of the leg devices or structures embodied in the gin.

Similar characters of reference are employed to indicate correspondingparts in the views.

Fig. 1 shows a. battery of gins including four gins and consisting oftwo double or twin gins, each of the said double gins being made up of atube with three legs, and between the legs the ginning devices, such asthe roll-box, saw cylinder, brush, etc. are disposed in each gin.

The numeral 1 designates a cast-metal leg for supporting the gin, whichis applied at opposite ends of a gin, as shown by Fig. 1, the said legbeing shown in reverse position by Figs. 3 and %l, and each has anopening 2 therein, surrounded by a flange 3. Each leg also has a contourand is provided with bearing means and projections to adapt it forassemblage with the remaining parts of the gin, the use of all bondingrods and securing devices for gin legs being dispensed with, and in lieuthereof particular tubular connecting means is employed and has a dualfunction, as will be more particularly hereinafter specified. Theintermediate leg shown by Fig. 5, and designated by the numeral 5, ispractically composed of two of the legs shown by Figs. 3 and 4, and inuse is arranged between contiguous ends of the double or twin gins, asshown by Fig. 1. The two plates 6, of the leg 5, are made as onecastingand joined or connected by a tubular coupling 7, w iich has an interiordiameter greater than the exterior diameter of the essential element ofthe invention, and which passes therethrough.

Each individual gin, to which in the present instance the features ofthe invention have been shown applied, comprises a rollboX 8, providedwith a breast-plate 9, and having end castings 10, to which the rollboxplate is secured by riveting, or by any other suitable means. The upperand lower rib rails 11 and 12 respectively have the upper and lowerextremities of the ribs or grates 13 secured thereto in the usual mannerand are disposed in operative relation to the of the saw-cylinder 14.The gin structure alsO embodies a seed-hopper 15, having a latch 16fixed thereto and adapted to hold the lower portion of the roll-box upwhen lifted out of operative connection with the saw cylinder. A bracket17 fixed to the lower portion of the roll-box catches upon the latch 16when the said lower portion of the roll-box is elevated. The end platesof the roll-box are also provided with pivotal boss means 18, whichengage recesses or notches 19 in the upper portions of the gin legs,bolts 20 being inserted through the upper portions of the gin legs abovethe bosses to prevent the latter from accidentally becomingdisplaced orlifting out of the said recesses or notches 19.

At the upper rear portion of the roll-box 8, a curved plate 21 issecured and forms I what is known as the back hollow of the rollbox. Itwill be notet that this plate 21 passes down and around the upper ribrail 11, and provides an armor plate or sheathing for the latter, thesaid rib rail 11 being securely held or reinforced against splitting bybolts 22 passed therethrough and the said plate 21. The gin organizationalso includes a gin brush 23, over which is a fixed top cover 2st, andat the rear of the brush or brush cylinder is a removable cover 25 topermit ready access to the same. The allcontrolling element of theinvention, however, is a tubular member or tube 26 which serves both asa means for connecting the legs or end members of the gin and as aconduit for the lint cotton, and is provided with an upper opening 27.

The function of the tubular member in connecting the legs or end membersof the gin is only incidental or secondary to the more importantfunction of the said member as a conduit for the lint cotton. As hereinbefore specified, the said tubular member is of uniform diameterthroughout its length or throughout the battery of gins with which it isused and is of comparatively reduced diameter, and under theseconditions will perform its function as a conduit for the line cottonequally well with a battery of two gins and a greater number of gins.

The lint cotton is conducted to the tubular member by means of a part 28which, in the present instance, is in effect a plate having one endarranged adjacent to the mote plate 29 or in correct position to receivethe material from the brush, the opposite end of the plate projectinginto the tubular member, serving not only as a nozzle or chute toconduct the material from the revolving brush into the tubular conduit,but thatportion thereof projecting into the tubular member also servesas a deflector to prevent the cotton lint that has a circulating motionin the conduit, from criving upwardly and returning to the revolvingbrush.

As a means of connecting the legs or end members of the gin, the tubularmember or tube 26 is highly efficient in that it strengthens the ginframe as an entirety and dispenses with the use of tie rods or otherconnecting means between the legs or end members of the gin frame andthus facilitates the assemblage of said legs.

The tubular member or tube 26 extends continuously through the length ofthe double gin and through the coupling 7 of the middle legs consistingof the two plates 6, the opposite ends or extremities of the tubularmember or tube 26 being continued beyond the end legs 1 of the doublegin, as shown by Fig. 1, and between the double gins the projecting endsof the tubular member are made continuous by applying a con nection, as7 in the form of a thin sheet of metal, which is merely telescoped overthe protruding ends of the tubular members of the two double gins, or bypreference this thin sheet of metal is merely wrapped around theprojecting ends of the tubular member. This construction will beduplicated throughout the entire series of double gins included in abattery comprising any number of such double gins.

It will be observed that the brush cylinder 23 is arranged in closeproximity to the inlet of the chute 28 of the tubular member or tube 26,and the lint cotton released from the saws is caused to pass through thesaid chute into the tubular member. The direction of movement of thebrush cylinder drives the air laden with the lint downwardly into thetubular member 26 through the chute 28.

It will be observed that the upper edge of the mote plate 29 is disposedclose to the brush cylinder 23, thus forming a materially reducedpassage between the brush cylinder and the upper edge of the mote plate,the adjustment of the upper edge of the mote plate being along a lineparallel with the periphery of the brush cylinder. The mote plate willbe provided with suitable adjusting means as indicated in the drawings,and by providing the adjusting means for the mote plate the upper edgeof the latter may be fixed at a point to secure the maximum motingeffect. The material feature in regard to the position of the upper edgeof the mote plate relatively to the brush cylinder is to produce an airinlet opening which is so narrow as to permit the passage of only aboutone-third of the air between the upper edge of the mote plate and brushcylinder in contradistinction to the prior well known gin organizationsand wherein the mote plate has its upper edge disposed at a considerabledistance from the brush cylinder. By arranging the upper edge of themote plate in close proximity to the brush cylinder the air is confinedin its passage between the upper edge of the mote plate and the cylinderto a thin stratum and is given an increased velocity in a downwarddirection, and the air between the upper edge of the mote plate isdriven by the incoming currents through the constricted passage betweenthe upper edge of the mote plate and brush cylinder and driven into thetubular member or lint flue 26. The thin stratum of air which is drawnbetween the brush cylinder and upper edge of the mote plate by reason ofthe formation of the constricted passage therefor, as just explained,

" being less in quantity and of higher velocity than in the ordinary andwell known gin organizations permits of the tubular member or lint fluebeing of materially less diameter than was found necessary in the oldstyle of gins using flues exteriorly thereof. Furthermore, the tubularmember or lint flue is disposed in close relation to the brush cylindersof the gins, and as a consequence the short connecting flues withvarious angles, turns and resulting eddies as found in the old style ofgins are eliminated, thereby increasing the capacity of the flueembodied in the present invention as a conduit means for the air andlint from the brush cylinders. By extending the plate 28, which servesas a chute or deflector plate, into the entrance opening of the tubularmember or lint fiue, swirling of the air and lint in the flue isprevented from adversely affecting the air current which carries thelint cotton into the flue or tube and ma terially assists in setting upa quick movement or travel of the currents of air laden with lint cottonlongitudinally through the tubular member.

The lint cotton delivered into the tubular member is conveyed or movedthrough the latter to any suitable point for further treatment, and theginning operation is greatly accelerated by the use of the tubularmember, and the combination therewith of the brush cylinder disposedadjacent thereto, as hereinbefore specified.

The terms tube and tubular member as applied to the part 26 in theforegoing description have been employed to conveniently illustrate onepreferred embodiment of the essential feature of the invention, and suchterms should not be con strued or interpreted in accordance with theliteral definition of the words tube and tubular member, but, on thecontrary, should be interpreted to include a hollow member or conduitmeans of any preferred form in cross-section applicable for cooperationwith the ginning mechanism ant including the brush cylinder. A change inthe cross-sectional contour of the tube, tubular member or conduit wouldnot effect the practical result sought and ob tained by the introductionof such device within the gin organization, and it will therefore beproperly inferred that the particular advantageous operation or functionof the conduit is sought, as hereinbefore explained, rather than aspecific cross-sectional contour of such conduit.

In my copending application relating to cotton gins, Serial Number199,514, filed March 23, 1904, the tube, tubular member, or conduit isdisclosed as the most essential feature in a gin organization without abrush cylinder or necessary restriction as to particular means forsetting up an air current for driving the lint cotton into the tube,tubular member or conduit. In this application particular stress is laidupon the use with the tube, tubular member or conduit of a brushcylinder as the distinguishing feature, the said brush cylinder creatinga conveying current for the lint cotton with relation to the tube,tubular member or conduit. The invention as disclosed herein, therefore,is a modified continuation of that disclosed in my above mentionedcopending application filed March 23, 190%.

From the foregoing disclosure it will be understood that the primary ormost essential feature of the invention is the tubular member of uniformdiameter throughout its length within the body of the gins and servingas a lint conduit means for a battery of gins varying in number andincidentally or as a secondary feature operating as a securing means forthe ends of the frame of the gin; the disposition of the tubular memberin close proximity to the ginning devices and particularly the brushcylinders of the gins and providing a contracted space between the upperedges of the mote plates and the brush cylinders to effect an indrawingof a thin stratum of air to decrease the quantity of air between themote plates and brush cylinders at the nearest approach of said platesto the cylinders, and increase the velocity of the air at such points,so that the brush cylinders will cause a downward deflection of the aircarrying the cotton at a high rate of speed into the tubular member overplates or chutes extended or projected into the inlets of the tubularmember at an angle relatively to the wall or" the tubular member toaccelerate the movement of the air on rents laden with cottonlongitudinally through the tubular member.

Having thus described the invention, what is claimed is:

1. In a cotton gin, the combination with supporting legs, of alongitudinal hollow member uniting the legs and operating as a receptivemeans for the lint and having a lint-receiving opening, and ginningdevices including a brush cylinder arranged to discharge into thelint-receiving opening of the member, the hollow member extending alongthe brush cylinder.

2. in a cotton gin, the combination of ginning mechanism including abrush cylinder, and a main hollow lint receiving member extendinglongitudinally through the body of the gin and forming the direct outletfor the lint cotton from the gin, a guiding means between the cylinderand conduit and tangentially arranged in relation to the latter, thebrush cylinder being arranged above the hollow member and operating toproduce an air current in the direction of and in the said member todrive the lint cotton into and through the latter.

3. In a cotton ginning apparatus, the combination with a plurality ofgins, a main hollow lint receiving member disposed longitudinally in thegins and extending endwise through the latter and continuous withrespect to all the gins, the hollow member having angularly disposedinlets communicating with the gins, and ginning mecha nism includingbrush cylinders, each brush cylinder being disposed in proximity to aninlet portion of the hollow member, the one extremity of each inletbeing tangentially arranged in relation to and closely associated witheach brush cylinder, a thin stratum of air of high velocity beingproduced adjacent to each brush cylinder and operating to drive the lintcotton into the hollow member;

4. The combination with a plurality of gins having ginning mechanismtherein including brush cylinders, of a longitudinal conduit extendingthrough the bodies of the several gins and rigidly uniting the legs ofthe latter, and also serving as a receptive medium for the lint, thebrush cylinders being disposed in cooperative relation to the conduitand operating to drive the lint cotton into the latter.

5. The combination with a plurality of gins having supporting legs, of ahollow member longitudinally extending through the gins and secured toand rigidly uniting the frames of the gins, and ginning mechanism ineach gin including a brush cylinder disposed in cooperative relationwith the portion of the hollow member passing therethrough and operatingto drive the lint cotton into said member.

6. In a cotton gin, the combination with ginning mechanism including abrush cylinder, of a hollow member extending longitue dinally throughthe gin and having an opening, the brush cylinder being disposedadjacent to the said opening, and a chute projecting in the said memberthrough the opening therein and having a device cooperating with theupper portion thereof and its edges projected close to the brushcylinder to provide a narrow air passage in re?- tion to said cylinder.

7. The combination of a plurality of gin; arranged end to end and havingintermediate legs consisting of double plates connected by a hollowcoupling, ginning mechanism, and a hollow member extendinglongitudinally through the gins and the hollow couplings of the legsandoperating to secure the gin frames in rigid relation and also as a lintreceiving medium.

8. The combination of a plurality of gins arranged end to end and havingintermedi ate legs consisting of double plates connected by a hollowcoupling, ginning mechanism, and a hollow member extendinglongitudinally through the gins and through the hollow couplings of thelegs and operating to secure the gin frames in rigid relation and alsoserving as a lint cotton receiving and conveying means for each gin andfor all of the gins as a whole, the hollow member being located beneathand adjacent to the ginning mechanism of each gin and having thecurrents of air produced therein by the operation of the ginningmechanism.

9. The combination with a cotton gin, of a tube contained within the ginbody and having an opening therein and serving to receive and conductthe lint cotton out through the end of the gin, and ginning mechanismincluding a brush cylinder located adjacent to the opening in the saidtube and operating to drive the lint cotton into the tube.

10. The combination with a plurality of gins having ginning devicesincluding brush cylinders, a tubular member passing through theextremities of the gins and having openings therein disposed inproximity to the brush cylinders, mote plates having their moting edgesarranged closely to the brush cylinders to form narrow air passages withrelation to said cylinders, and deflecting plates extending from themote plates into the openings in the hollow member.

11. The combination with a gin having ginning devices, including a brushcylinder and legs for supporting the ginning devices, a conduit havingan opening and acting as a longitudinal portion of the gin frame torigidly hold the legs of the gin in position, and a plate extending froma point adjacent to the brush cylinder downwardly and rearwardly intothe opening in the conduit to form a chute projecting into the conduit.

12. The combination with a plurality of gins, each gin having ginningdevices in cluding a brush cylinder, and legs in each gin for supportingthe ginning devices, a hollow member in each gin acting as thelongitudinal portion of the gin frame and rigidly securing the legs ofthe gin in position, the said hollow members of the different gins beingextended through the gin legs and connected at their adjacent terminalsto form a common conduit into which the cotton is directed by the brushcylinders and conducted away from the gins.

13. In a gin, embodying suitable ginning devices including a revolublebrush, a hollow member arranged adjacent to the periphery of the brushand having a lint-receiving opening therein through which the lint fromthe brush is discharged into the hollow member, and an angularlydisposed plate projecting into the hollow member in proximity to theopening therein for preventing escape of the lint from the tubularmember to the brush, the upper portion of the plate having a mote platethe moting edge of which is arranged near the brush to form a narrow airpassage with relation to the latter and to produce a thin film of air ofhigh force and velocity to carry the lint cotton into the hollow member.

1a. In a gin embodying suitable ginning devices embodying a revolublebrush, and supporting legs, a hollow member extending between the legsand in proximity to the brush and having a lint-receiving openingtherein adjacent to the periphery of the brush, and a plate projectingthrough the said opening into the hollow member and serving as a chutefor conducting the lint from the brush into the hollow member, andpreventing escape of the lint from the latter through the said opening.

15. In a cotton gin, the combination with supporting legs, of ginningmechanism in cluding a brush cylinder having means cooperating therewithfor forming a thin film of air adjacent thereto for driving the lintcotton therefrom, and a longitudinal conduit extending through the bodyof the gin and uniting the legs and arranged to receive the lint fromthe ginning mechanism, the said longitudinal conduit forming an end exitfor the lint.

16. The combination of a plurality of cotton gins arranged as a battery,each gin having a conduit inclosed within the body thereof and openingout endwiso through the same, the conduit provided with an opening andserving to receive and conduct the lint cotton out through the end ofthe gin, the conduits of the several gins being connected, and ginningmechanism in each gin including a brush cylinder disposed adjacent tothe opening of its corresponding conduit, the brush cylinders operatingto drive the lint cotton into and through the connected conduits.

17. A cotton gin having ginning and brush cylinders therein and alsocontaining within the body thereof a main lint receiving conduit havingan inlet openin extending along the brush cylinder, the conduitextending from end to end of the gin close to the brush cylinder andadapted to receive and conduct lint cotton from the said brush cylinderout through the end of the gin, and a guiding means interposed betweenthe brush cylinder and the opening in the conduit, said conveying meansprojecting upwardly from the conduit at an angle of inclination inproximity to a portion of the brush cylinder.

18. A cotton gin having ginning mechanism including a brush cylinder andcontaining within its body a main hollow lint receiving member with anopening extending longitudinally thereof in receiving position withrelation to the brush cylinder and along and close to the latter, and aninolined conveying means extending from the opening of the main hollowmember upwardly in proximity to the brush cylinder, the brush cylinderoperating to forcefully drive air currents and the lint cottondownwardly over the guiding means into the hollow member, the saidhollow member serving to conduct the lint cot-ton out through the end ofthe gin by the air currents forcefully created therein through theoperation of the brush cylinder.

19. A cotton gin having a ginning saw cylinder and a brush cylindercooperating with the saw cylinder, a main hollow lint receiving anddischarging conduit inclosed within the body of the gin and extendingfrom end to end of the gin along and close to the brush cylinder andopening out through the opposite ends of the gin, a brush cylindercreating an air current of high velocity for driving the lint cottondownwardly from the saw cylinder into the said hollow discharging meansand causing the lint cotton to travel through the latter and out throughthe end of the gin, and an inclined guiding means interposed between thebrush cylinder and the said hollow lint receiving and discharging meansand operating to direct the air current car rying the lint cotton andthe movement of the current and cotton through the said dischargingmeans.

20. In a cotton gin, the combination with supporting legs, of ginningmechanism including a brush cylinder operating to generate air currentsof high velocity, and a longitudinal hollow member extending through thebody of the gin and uniting the legs, the said longitudinal memberhaving communication with the interior of the gin and receiving said aircurrents laden with lint and forming an end exit for the lint.

21. A cotton gin having ginning and brush cylinders and containingwithin the body thereof a main lint conveying conduit having an inletopening along and in longitudinal relation to the brush cylinder and inproximity to the latter, the conduit being disposed beneath the brushcylinder and serving to receive the lint cotton directly from saidcylinder and conduct the cotton outwardly through the open end of thegin, and an inclined nozzle between the brush cylinder and the conduit.

22. In a cotton gin, the combination with a ginning cylinder, of a brushcylinder having means cooperating therewith in addition to the brushmaterial thereof to form air currents, a main lint receiving conduitarranged within the body of the gin and extending longitudinally alongand in proximity to the under portion of the brush cylinder to receivedownwardly driven air currents laden with lint cotton from the brushcylinder and also serving to conduct the lint cotton outwardly throughone end of the gin, and downwardly extending inclined guiding meansbetween the upper portion of the conduit and the lower portion of thebrush cylinder.

23. The combination with a plurality of cotton gins arranged end to endand each having a ginning cylinder and a brush cylinder therein, of amain lint cotton receiving conduit disposed within the bodies of all thegins and extending longitudinally through the latter adjacent to thebrush cylinders and beneath said cylinders, the conduit serving toreceive and conduct the lint cotton along, through and away from thegins, the brush cylinders operating to produce air currents of highvelocity which are driven with the cotton into the conduit and carriedalong through said conduit by the air current producing action of thebrush cylinders, the air currents within the conduits being augmented bythe brush cylinders of the successive gins toward the outlet of theconduit, and downwardly extending inclined guiding means between thebrush cylinders and the top portions of the conduits within the gins.

24. The combination with a plurality of cotton gins having ginningcylinders and brush cylinders therein, of a main lint receiving conduitarranged within and extending longitudinally through the bodies of thegins beneath and along the brush cylinders, the conduit having anopening in each gin close to the brush cylinder of the latter andserving to receive and provide a means common to all the gins fordischarging the lint from the latter, and downwardly extending inclinedguiding means between the brush cylinders and the openings in theconduit for assisting in directing the air currents as to their entranceinto the conduit at such an angle as to create conveying currents withinthe conduit.

25. In a cotton gin, the combination with ginning mechanism including abrush cylinder, of a conduit extending longitudinally through the ginand having an upper opening, the brush cylinder being disposed over theopening in the conduit and in close operative relation to the latter,and a chute extending at an angle into the conduit and having a lintplate forming a part thereof and extending above the conduit.

26. In a gin, the combination of ginning mechanism, a roll box, upperand lower grate rails, and a curved plate forming the back-hollow forthe roll box, the lower portion of the curved plate embracing andforming an armor for the upper grate rail.

27. In a gin, the combination of ginning mechanism including a roll box,upper and lower grate rails, a curved plate forming the back hollow forthe roll box, the lower portion of this curved plate embracing andforming an armor for the upper grate rail,

and strengthening devices inserted through the upper rail and its armor.

28. A cotton gin having ginning mechanism including a brush cylinder,and a main hollow member contained Within the body of the gin close toand along the brush cylinder to directly receive lint cotton and aircurrents from the said cylinder, an inclined guiding means beinginterposed between the member and the brush cylinder in tangentialrelation to both of the latter, the brush cylinder creating and drivingthe air currents laden with lint cotton into the hollow member andforcing the cotton outwardly through the said member.

29. A battery of cotton gins having ginning mechanism including brushcylinders, a hollow member extending through the bodies of the batteryof gins and having inlets in proximity to the brush cylinders, thehollow member serving to receive the main lint cotton and forming a lintcotton outlet common to all the gins, and nozzles cooper ating with eachbrush cylinder and the hollow member to cause the said cylinder by itsoperation to generate air currents of high velocity and drive saidcurrents laden with lint cotton into the hollow member, the air currentsforced into the hollow member by the brush cylinders being the solemeans for moving the lint cotton through and outwardly from the saidhollow member.

30. In a gin, ginning mechanism including a brush cylinder, a hollowmember inclosed within the body of the gin and form ing an outlet forthe lint cotton endwise through the gin and provided with a lintreceiving opening adjacent to the brush cylinder, and means projectinginto the member for preventing the return of the lint cotton through thelint receiving opening to the brush cylinder.

31.. In a gin, ginning devices including a brush cylinder which createsair currents in the direction of its rotation, a hollow member inclosedwithin the body of the gin and forming an outlet for the lint cottonendwise through the gin and provided with a lint receiving openingadjacent to the brush cylinder, the brush cylinder and the air currentscreated thereby forcing and carrying the lint cotton from the ginningdevices into and also creating lint laden air currents in the member,and means extending into the hollow member for preventing the lint ladenair currents in the member from returning to and affecting the aircurrents created by the brush cylinder adjacent to the latter.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

STEPHEN D. MURRAY.

Witnesses:

R. H. CHATI-IAM, R. H. Nnvrr'r.

topics of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

